Motor-control system.



No. 795,000. PATENTED JULY 18, 1905.

W. O. MUNDY. MOTOR. CONTROL SYSTEM.

vAPPLICATION.IILED FEB. 20,1903. 2 SHEETB SHEET 1- W'TNESSES? INVENTORY Wi|li rn -O.Mundy.

No." 795,000. PATENTED JULY 18,1905.

W. 0. MUNDY. -MOTOR CONTROL SYSTEM.

APPLICATION FILED IBB. 20,1903.

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William O. Mundy.

Patented July 18, 1905.

PATENT OFFICE.

WILLIAM o. MUNDY, or s1. LOUlS, MISSOURI, ASSIGNOR TO. GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW'YORK.

.Mo oR-ooNTnoL SYSTEM.

' SPECIFICATION forming part of Letters Patent No. 795,000, dated J uly- 18, 1905.

' e I Application filed February 20, 1903. Serial No. 144,195.

To a, whom it may concern:

Be it known that I, \ViLLiAM O. MUNDY, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented certain new and useful Improvements in M0- tor-Control Systems, of which the following isaspecification.

1 My invention relates to systems of motor control employing controllers comp ising a plurality of separately-actuated contacts, and

relates more particularly to the construction. and arrangement of the electromagneticallyactuated contacts or switches used in such systems.

' In' train-control systems such as that shown 687,060, granted November 19, 1901, a motor-v controllencomprising a plurality of separately-actuated contacts is employed, each of said contacts being operated electromagnetically and controlled from a master-controller located in any desired part of the car ortrain. In the system shown in said patent a number of ,the electromagnetically-actuated switches or contactors are used for the purpose of vary ing the resistance in the motor-circuit, wh le others'are used for connecting the motorsin switches used for connecting the motors to the v series or in parallel -relationship.' In the said patent th'e contactors are so arranged that the I conductor leading from one of the contacts of each switch usedfor varying the resistance in the motor circuit and from the switch or source of power is connected for-convenience ,to a common conductor which forms part of the motor-circuit.

The object of my inventionis to so construct and arrange the contactors of -.such a'motor control systemas that shown in said patent to Perry that thecost of manufacture and the space occupied by the said contactors when in their operative position on the car are materially reduced.

This is accomplished by group- 1ng together on a single frame of conducting -material the contactors which are to have their contacts electrically connected to the common conductor, above referred to, and by allowing the frame itself to form said com mon'conductor. This construction obviates A further object of my inventionis to produce a more efficient contactor and blow-out chute;- and tothis end my inven-tionconsists of improvements in the-construction of the blow-out'chute and the arrangement of the same relative to the contactor and its actuating mechanism. This construction and'arrangement will be hereinafter more clearly described, and the novel features will be particularly pointed out in the appended claims.

In the accompanying drawings, which illustrate one embodiment of my invention, Figure 1 represents diagrammatically a train-control system in which the contactors are arranged Fig.2 is a perspective view of two of said contactors mounted on a single frame of conducting mainaccordance with my invention.

terial, showing clearly the relative arrangement of the blow-out chute and switch-actuating mechanism. Fig. 3 is a sectional elevation of one of said contactors,and Fig; 4 is a diagrammatic representation of the'electrical connect-ions of one of said contactors'.

Referring now to Fig. 1, M M represen the master-controllers of a train-control sys tem in which the separately-actuated contacts T T R R R R R R R R S P P form the controller for the motors M M The said contactors are adapted to connect thernotors to the trolley or collector shoe T and also to insert the required amount of resistance in the motor-ci,rcuit during acceleration. The res'istances controlled by the resistance-contactors are represented by "1' to r; nclusive. The

motor-circuits are represented by heavy lines,

while the control-circuits,l in which the actu. ating-coi-ls of the contactors are located, are represented by light lines. The resistances whi'ch are connected in the control-circuits abcd are -represented by 0' r 1' ,1 The conductors of the control-circuits are connected with the proper contact=fingers in the master-control lers M M and are bound together in the form of a cable C, which runs throughout the train, the terminals 0 being provided for the purpose of connecting the cable of one car to the cable of the next adjacent car. A moredetailed description of the connections of this said common conductor; but in my improved system may be obtained from the patent above arrangement I have greatly reduced the number of connectors and binding-posts required by mounting a plurality of the contact-ors on. a single frame of conducting material and so,

connectingthe said frame in the motor-circuit that it takes the place of said common conductor. V 1

, In Fig. 1 I'have shown the contactors T, T, R; R and-R mounted on a single frame,

each having one of its contacts connected electrically to said frame. I have also mounted the contactors RR R? of conducting material the contacts of each trically to said frame. As shown, the frame of the first groupis electrically connected, by means of the conductor; the second .and connected one of group. It will be understood that the contactors just referred to might all be" mounted on a single frame; butfor convenience in arrangement and in the assemblying of parts the two groups of contactors have been mounted on separate frames electrically connected together. As an illustration ofthe course of the current through the motor-circuits with this improved contactor arrange sistance-contactors ment I will trace the tors when one of the master-controllers M is in its final series position. In said position all the contactors except R and P P, which are used only in the parallel positions of the controller, are operated, and the motor-circuit is completed from the trolley Tas follows: through conductor 1, conductor 2, switches of the con'tactors T T in parallel through the frame 6 and frame 6', switche'sof all the reexcept-R in parallel, the contactors R R, constituting practically. a "short circuit .for through the frames'b and hand conductor '3, thence through conductor 4, motor'M', conductor 5,.switch of conductor 6, and motor M to ground at G.

Referring now to Figs. 2 and 3, A represents the actuating-coil of the contact'or, the said'actuati'ng-coil being mounted on the frame 6 and held in place firmly held in the proper position relative to R? R ona single frame magnetic material en of sad contactors elec- 3, with the frame of ing blow-out chute. ing the plates q in thei r proper position. Also circuit through the mosaid reslstance contactors the contactor S, frame 6 on said frame by means of the cap-plate d. I Said base and cap plate are each other by means of the rods 7. The entire structure is adapted to be suspended from the floor of a car or supported in any other desired position, and when fastened directly to the said floor it is held by means of bolts which pass through the openings al in the cap-plate (Z.

lever-arm'm, which is pivotally mounted on r the lug it, carried by the base-plate of the frame 6 at n, and is electrically connected to said base throughthe flexible conductor 1) and the said lug n.

Fastened to the front of each contactor is a plateq, of insulating material, upon which is mounted the-fixed contact k, with which the contact k", carried by the arm Z7, is adapted to engage. Also carried by the said insulatingplate q is the coil t of the blow-out magnet, the poles at 'of which are formed of strips of bedded in theside walls q of the protecting-h using for the contactorterminals. The said poles 25 are adapted to embrace the contact-terminals k and 7c" and are bolted at t to' the core 25 of the blow-out magnet. vThe roof of is represented at g Mounted within the said protecting-housing are the plates-q 'and 9, set at an angle to each other and forming with the side wallsof said protecting-housinga flar- The rods 41 assist in holdmounted within the protecting-housing is a terminal or binding-pesto, to which one of the motor-leads which enters the protecting housing through the opening 0 is connected. The other motor=lead is connected to the binding-post 0, which is fastened to the frame 6 and electrically connected therewith. Also mounted within the protecting-housing are the replaceable plates 3 of soapstone mother insulating material notreadily' affected by the are formed between the contact-terminals Z! and k These plates may readily be replaced I when damaged without the necessity of dis carding theentire protecting-housing.

The electrical circuit through the switch and blow-out magnet is shown clearly in Fig. 4 and is as fol-lowsr-from'the'binding-post or terminal '0 throughthe coil of the blow-out the protecting-housing magnet-coil t, fixed contact 'kl, movable -con 'tact k of the switch, through the arm is, le- .ver-arm m, flexible conductor 3), lug a, frame b to the terminal 0'.

By constructing the blow-out chute and magnets as above describ'ed the are formed between the contacts of the switch is constrained fcuit, a plurality of separately-actuated con to moveoutwardly-away from the actuating mechanism and is gradually lengthened, due

to the inclined position of. the plates q? and q*, until disrupted; The coil of the blow out magnet inaddition to the protection afforded by the housing is protected frominjury from the are by the upper inclined plate g What I claimas new, and desire to secure by Letters Patent of the United States, is I. In a motor-control system, a motor-cirtacts forming part of thecontroller for the motoror motors in said circuit, and electromagnetic means for operating said contact's, the said contacts being mounted upon a single frame forming part of the motor-circuit and also part of the magnetic circuit of said electromagnetic means for operating said contacts. A

2. ln combmation, a frame of conducting material, and a-plurality of switches mounted on said frame each-of said-switches having one of its contacts electrically connected to said frame, and the contact with which said contact engages su pported said frame but insulated therefrom.

3.. In combination, a frame of conducting material, and ,a-plurality of switches mountported by said frame but insulated therefrom;

ed on said frame each of said switches having a contact-carrying arm mounted directly on said frame and a relatively fixed contact sup- 7, 4. In -.combinatioii1a. frameof conducting .matcrial, and a plurality of separately-actuated switches mounted thereon each of said switches having one of its members carried.

by a movable arm electrically connected to said frame andanother member with which fjswi'tcheshayin'g its movable member mounted on an arm pivoted'directly'to said frame :so that the frame constitutes-a common elecsaid first-mentioned member'engages supported by "said frame but insulated therefrom.

5. In combination, a frame of conducting material, and a plurality of separately-actuated switches. mounted thereon-- each of said Ktrical connection for the said movable switch members. i- I 6. Iii-combination, a plurality of electromagnetically-actuated switches, a frame of conducting material on which said switches aremounted, and means for holding the ac:

tuating-coils of 'saidswitches in position on said frame said switches being so construct.- e and arranged that one of the contacts of each switch is electrically connected to said frame.

' 7. In combination with an electromagnetic ally-actuated switch, a-blow-out magnet whose poles are adapted to embrace the contacts of said switch, aiprotecting-housing for the contacts of said switch and the coil of said blowout magnet, and a flaring blow-out chute formed by the side walls of said housing and inclined insulating-plates located within said housing.

8. In combination with a switch, a protecting-housingof insulating material within which the contacts of said switch operate, a

blow -outmagnet havingfits coil mounted within the housing and its poles embeddedin the sidewalls of saidrhousin'g said poles being adapted to embrace the contacts of said switch, and inclined plates mounted within said housing adapted to form with the side walls of-said housing'a flaring blow-out chute.

9. In combination, ,in an electromagnetically-actuated switch, a supportingframe, a.

solenoid-winding mounted thereon, a switchcont'act rigidly mounted at one side of said frame and insulated therefrom, a relatively movable-switch-contact carried by an arm pivoted to the supporting-frame, asolenoid-core WI LIAM o. MUNDY. Witnesses;

BENJAMIN B. HULL, HELEN ORFORD. I 

